Induction-coil.



PATENTED OCT. 4, 1904.

J. SPLITDORF. INDUGTION COIL.

APPLIGATION FILED FEB. 22, 1904.

N0 MODEL.

q llluam a r fiiw mlr a 14 Patented October 4, 1904.

UNITED STATES PATENT OFFICE.

JOHN SPLITDORF, OF NEW YORK, N. Y.

IN DUCTlON-COIL.

SPECIFICATION forming part of Letters Patent No. 771,332, dated October4, 1904.

" Application filed February 23, 1904. Serial No. 194,794. (No model.)

specification.

This invention relates to induction coils equipped with a main andauxiliary condenser; and it consists in a specific arrangement of mydevices disclosed in my original patent in this art, No. 73201 1, datedJune 23,1903, the particular feature of modification herein repre-'sented residing in the relative electrical arrangement of the auxiliarycondenser with respect to the main condenser and the other componentelements of the coil.

The purpose of my present invention corresponds with that of my saidformer patent, but provides for the arrangement of the auxiliarycondenser in series with the main condenser and the primary Windinginstead of being in parallel relation thereto, said auxiliary condenserbeing connected around the mechanical make-and-break device in agasengine circuit to allow the operation of the induced circuit in ajump-spark coil whose primary circuit is closed between the vibrator andadjusting-screw. I

In the drawings accompanying this application Figure 1 is a diagrammaticview of an induction-coil with the various terminals and contacts andshowing my auxiliary condenser in circuit, and Fig. 2 is an elevation ofthe same in perspective including the coil-casing.

In said views let A indicate the usual core composed of a bundle ofsoft-iron wires; B, the primary, and C the secondary, windings. Theusual insulation of the wires themselves and intermediate the windingsand the core will be understood as arranged in the usual manner.

0 0 indicate the terminals or opposed sparkpoints of the secondarywinding.

D indicates a battery or other source of electrical energy, and E isintended to represent the usual make-and-break device located in thecircuit between the primary and bat tery and arranged to be operated bya cam or other moving member of the engine equipment. A binding-post, asF, mounted upon the coil-casing G, receives the battery-terminal (Z andthe primary terminal 5, while a binding-post, as H, receives thebattery-terminal (Z and one end of a short connecting-wire J, whoseopposite end is connected with the usual bridge, as K, which supportsthe adjusting-screw L. Said binding-post H receives a terminal of theusual condenser I, whose other terminal is connected with the mount orsupport N in the usual manner. The circuit is completed through thevibrator spring-arm M (carrying armature m) and its support N, thelatter having connected therewith the terminal 6 of the primary.

So far we have described the usual component elements of a jump-sparkcoil, the operation of which is well known.

In incorporating my specific arrangement therein I provide an auxiliarycondenser, as O, locating sameas, for instance, within the lower part ofthe casing GGlllllBI above or beneath the usual condenser, but separatedtherefrom, as by insulation 0, or said auxiliary condenser being locatedexterior to casing G at any convenient point, it being unnecessary forsaid auxiliary condenser in the performance of its functions to be incontiguity to theusual condenser or to any other element of the coil.One terminal, 0 of the auxiliary condenser connects with thebinding-post F, while the opposite terminal, 0', connects with abinding-post P, that is located in the circuit between the battery andthe make-and-break device E.

Thus, as will be apparent, the essence of the present modification of myprevious patent lies in the connection of the auxiliary condenser aroundthe engine make-and-break device or mechanical interrupter, whereby theauxiliary condenser is placed in series with the main condenser.

It will further be noticed that while one of the condensers is connectedin parallel with the vibrator the other condenser is connected inparallel with the engine make-and-break device.

It will also be seen that the present application discloses a specificorganization of the elements set forth in the broad patent alreadyreferred to.

Having now described my invention, I declare that What 1 claim is- 1. Anauxiliary condenser for spark-coils, the opposite terminals of saidcondenser being, respectively, connected in the primary circuit atopposite sides of the engine makeand-break device.

2. A spark-coil having the usual primary and secondary windings and apair of condensers, one of said condensers being connected in parallelwith the vibrator, and the other condenser being connected in parallelWith the engine make-and-break device.

3. The combination With a spark-coil, of a pair of condensers arrangedin series With each other and With the primary of the spark-coil.

4. A spark-coil having the usual primary and secondary windings, and apair of condensers in series With the primary and each other, incombination With the usual circuit making and breaking devices whereby asuccession of discharges is made in the secondary circuit.

5. The combination With a spark-coil, of a condenser in series With theprimary thereof, a short circuit adapted to cut out the said condenser,means for intermittently interrupting the short circuit, and anauxiliary condenser also in series with the primary, the said auxiliarycondenser being adapted to be brought into action by an externalmake-and-break device independently of the means for intermittentlyinterrupting the short circuit.

Signed at New York this 10th day of February, 1904.

JOHN SPLITDORF.

Witnesses:

F. W. BARKER, FREDERICK (J. BoNNY.

